diff --git a/package.json b/package.json
index 0fd06d12..612e05e7 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   "devDependencies": {
     "gulp": "^3.9.0",
     "gulp-qunit": "^1.2.1",
-    "prepro": "~0.9.0",
+    "prepro": "~0.9.1",
     "qunitjs": "~1.15.0",
     "uglify-js": "~2.4.24"
   },